docs(demos): fix circular dependency

demos/component-docs/slides/slides.ts

@@ -1,7 +1,10 @@
 import {Page} from 'ionic/ionic';
+import {forwardRef} from 'angular2/angular2';
+import {AndroidAttribute} from '../helpers';
 
 @Page({
     templateUrl: 'slides/slides.html',
+    directives: [forwardRef(() => AndroidAttribute)]
 })
 export class SlidesPage {
   constructor() {